Sensors: Fix the permission of apds993x nodes

sysfs nodes should not be world writeable

Change-Id: Ieb5f1b28c070feb758da1c1c7ea5a7a7adf564af
Signed-off-by: Devin Kim <dojip.kim@lge.com>
Git-commit: 5718f96237aef5085785ba28511874cba5ad8904
Git-repo: https://android.googlesource.com/kernel/msm.git


[mengmeng@codeaurora.org: cherry picked from mirrored branch]
Signed-off-by: Oliver Wang <mengmeng@codeaurora.org>